oj.uz

답안 #772257

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
772257 2023-07-03T20:27:53 Z danikoynov Potatoes and fertilizers (LMIO19_bulves) C++14
30 / 100
 339 ms 39412 KB 
#include <iostream>
#include<stdio.h>
#include <cmath>
#include<algorithm>
#include <set>
#include <cassert>
#include <numeric>
#include <fstream>

#define endl '\n'
#define int long long
typedef long long ll;

struct slope_trick
{
    const ll inf = 9223372036854775807ll;

    std::multiset < ll > left_set, right_set;
    ll height;

    slope_trick()
    {
        height = 0;
    }


    ll get_right()
    {
        if (right_set.empty())
            return inf;
        return *right_set.begin();
    }

    ll get_left()
    {
        if (left_set.empty())
            return -inf;
        return *left_set.rbegin();
    }

    void add_basic(ll v) /// adds |x - v|
    {
        ll left = get_left(), right = get_right();

        if (v >= left && v <= right)
        {
            left_set.insert(v);
            right_set.insert(v);
        }
        else if (v < left)
        {
            left_set.insert(v);
            left_set.insert(v);

            right_set.insert(left);
            left_set.erase(left_set.find(left));

            height = height + abs(v - left);
        }
    }


    void print_slope_trick()
    {
        std::cout << "left_slope" << endl;
        for (int cor : left_set)
            std::cout << cor << " ";
        std::cout << endl;
        std::cout << "right_slope" << endl;
        for (int cor : right_set)
            std::cout << cor << " ";
        std::cout << endl;
        std::cout << "height " << height << endl;
    }


    void prefix_minimum()
    {


        right_set.clear();
        ///right_set.clear();
    }

    ll query_vlaue(ll debit)
    {

        ll last = get_left(), slope = 0, base = height;
        while(left_set.size() > 0 && get_left() > debit)
        {
            ll distance = last - get_left();
            base = base + distance * slope;
            slope ++;
            last = last - distance;
            assert(left_set.size() > 0);
            left_set.erase(prev(left_set.end()));
        }

        if (slope != 0)
        {
            assert(last >= debit);
            base = base + (last - debit) * slope;
        }

        return base;
    }
};


const int maxn = 500010;

int n;
ll a[maxn], b[maxn];
ll x[maxn], pref[maxn];

void solve()
{
    std::cin >> n;
    for (int i = 1; i <= n; i ++)
    {
        std::cin >> a[i] >> b[i];
        x[i] = a[i] - b[i];
        pref[i] = pref[i - 1] + x[i];
    }


    ll sum = 0;
    for (int i = 1; i <= n; i ++)
    {
        sum += abs(pref[i]);
    }
    slope_trick st;

    ll cnt = 0;
    for (int i = 1; i <= n; i ++)
    {
        if (pref[i] < 0)
        {
            st.height += -pref[i];
            cnt ++;
            st.add_basic(0);
        }
        else
            st.add_basic(pref[i]), cnt ++;
        st.prefix_minimum();
        //std::cout << "--------------------" << endl;
        // st.print_slope_trick();
    }
    ///std::cout << "dasdas" << endl;

    ll sumf = 0;
    for (ll val : st.left_set)
        sumf += val;
    sumf += st.height;

    ll ans = st.query_vlaue(pref[n]);

    ///std::cout << "-----------------" << endl;
    std::cout << ans << endl;
}

void speed()
{
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(NULL);
    std::cout.tie(NULL);
}

signed main()
{

    ///speed();
    ///freopen("test.txt","r", stdin);

    solve();

    return 0;
}

Subtask #1
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 27 ms 4176 KB Output is correct
5 Correct 59 ms 8136 KB Output is correct
6 Correct 188 ms 19876 KB Output is correct
7 Correct 339 ms 39308 KB Output is correct
8 Incorrect 306 ms 39412 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 27 ms 4176 KB Output is correct
5 Correct 59 ms 8136 KB Output is correct
6 Correct 188 ms 19876 KB Output is correct
7 Correct 339 ms 39308 KB Output is correct
8 Incorrect 306 ms 39412 KB Output isn't correct
9 Halted 0 ms 0 KB -

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 2 ms 468 KB Output is correct
7 Correct 3 ms 488 KB Output is correct
8 Correct 2 ms 468 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct

Subtask #4
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 3 ms 488 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 2 ms 468 KB Output is correct
12 Correct 2 ms 468 KB Output is correct
13 Correct 2 ms 468 KB Output is correct
14 Correct 2 ms 468 KB Output is correct
15 Correct 2 ms 468 KB Output is correct
16 Correct 2 ms 468 KB Output is correct
17 Correct 2 ms 468 KB Output is correct
18 Correct 2 ms 468 KB Output is correct

Subtask #5
0 / 36.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 468 KB Output is correct
3 Correct 2 ms 468 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 2 ms 468 KB Output is correct
8 Correct 3 ms 488 KB Output is correct
9 Correct 2 ms 468 KB Output is correct
10 Correct 2 ms 468 KB Output is correct
11 Correct 27 ms 4176 KB Output is correct
12 Correct 59 ms 8136 KB Output is correct
13 Correct 188 ms 19876 KB Output is correct
14 Correct 339 ms 39308 KB Output is correct
15 Incorrect 306 ms 39412 KB Output isn't correct
16 Halted 0 ms 0 KB -